SN74ABT18502PM

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics: High-speed, low-power, bidirectional voltage translation between different logic levels
• Package: 48-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Voltage level shifting for seamless communication between devices operating at different logic levels
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 1.2V to 3.6V
• Logic Voltage Levels: 1.2V, 1.8V, 2.5V, and 3.3V
• Maximum Data Rate: 100 Mbps
• Number of Channels: 10
• Input/Output Compatibility: TTL, CMOS, LVCMOS

Detailed Pin Configuration

The SN74ABT18502PM has a total of 48 pins, which are assigned as follows:

1. VCCA - Power supply voltage for side A
2. VCCB - Power supply voltage for side B
3. GND - Ground
4. OEAB - Output enable for side A to side B
5. OEBA - Output enable for side B to side A
6. DIR - Direction control input 7-16. A1-A10 - Side A data inputs/outputs 17-26. B1-B10 - Side B data inputs/outputs
7. VREF - Reference voltage for level translation
8. GND - Ground
9. NC - No connection
10. NC - No connection
11. NC - No connection
12. NC - No connection 33-42. C1-C10 - Side C data inputs/outputs 43-52. D1-D10 - Side D data inputs/outputs
13. VCC - Power supply voltage
14. GND - Ground

Functional Features

• Bidirectional voltage translation: Allows seamless communication between devices operating at different logic levels.
• High-speed operation: Supports data rates up to 100 Mbps, enabling efficient data transfer.
• Low-power consumption: Designed to minimize power consumption, making it suitable for battery-powered applications.
• Wide supply voltage range: Can operate with supply voltages ranging from 1.2V to 3.6V, providing flexibility in various applications.
• Input/output compatibility: Compatible with TTL, CMOS, and LVCMOS logic families, ensuring compatibility with a wide range of devices.

Advantages and Disadvantages

Advantages: - Enables communication between devices with different logic levels - High-speed operation for efficient data transfer - Low-power consumption for energy-efficient applications - Wide supply voltage range for flexibility - Compatibility with multiple logic families

Disadvantages: - Limited number of channels (10) - Requires careful consideration of voltage level compatibility to avoid signal degradation or damage

Working Principles

The SN74ABT18502PM utilizes a combination of level-shifting circuitry and bidirectional buffers to translate voltage levels between different logic families. The direction control input (DIR) determines the direction of translation, allowing data to flow from side A to side B or vice versa. The output enable signals (OEAB and OEBA) control the tri-state buffers, enabling or disabling the data transmission.

Detailed Application Field Plans

The SN74ABT18502PM is commonly used in various applications that require voltage level translation between different logic families. Some of the typical application fields include:

1. Microcontroller interfacing: Facilitates communication between microcontrollers operating at different logic levels.
2. Sensor interfaces: Enables connectivity between sensors and microcontrollers with varying voltage requirements.
3. Communication systems: Supports voltage level translation in communication protocols such as UART, SPI, and I2C.
4. Industrial automation: Allows integration of devices with different logic levels in industrial control systems.

Detailed and Complete Alternative Models

1. SN74LVC245A: 8-bit bidirectional voltage level translator with a lower supply voltage range (1.65V to 3.6V).
2. TXB0108: 8-bit bidirectional voltage level translator with automatic direction sensing and a wide supply voltage range (1.2V to 3.6V).
3. PCA9306: Dual bidirectional I2C-bus and SMBus voltage level translator with integrated level-shifting circuitry.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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